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DETERMINANTS OF GREEN PURCHASE INTENTION IN NIGERIA: THE
MEDIATING ROLE OF PERCEIVED BEHAVIOURAL CONTROL
ENVIRONMENTAL CONSCIOUSNESS AND GREEN TRUST
VICTORIA MASI HARUNA KARATU
DOCTOR OF PHILOSOPHY
UNIVERSITI UTARA MALAYSIA
NOVEMBER 2015
i
DETERMINANTS OF GREEN PURCHASE INTENTION IN NIGERIA: THE
MEDIATING ROLE OF PERCEIVED BEHAVIOURAL CONTROL
ENVIRONMENTAL CONSCIOUSNESS AND GREEN TRUST
VICTORIA MASI HARUNA KARATU
Thesis Submitted to
Othman Yeop Abdullah Graduate School of Business,
Universiti Utara Malaysia.
In Fulfilment of the Requirements for the Degree of Doctor of Philosophy
iv
PERMISSION TO USE
In presenting this thesis in fulfilment of the requirement for a Post Graduate Degree
from the Universiti Utara Malaysia (UUM), I further agree that the Library of this
Universiti may make freely available for inspection. I further agree that permission
for copying this thesis in any manner, in whole or in part, for scholarly purposes may
be granted by my supervisor(s) or in their absence, by the Dean of Othman Yeop
Abdullah Graduate School of Business where I did my thesis. It is understood that
any copying or publication or use of this thesis or part of it for financial gain shall be
given to me and the UUM in any scholarly use which may be of any material in my
thesis.
Request for permission to copy or to make other use of materials in this thesis in
whole or in part should be addressed to:
Dean of Othman of Yeop Abdullah Graduate School of Business
Universiti Utara Malaysia
06010 UUM Sintok
Kedah Darul Aman
v
ABSTRACT
Green purchase is a widely known phenomenon especially in developed countries
and in some developing nations. However, this seemingly known practice is still
slow in gathering momentum in places like Nigeria due to the low level of its
awareness. The cogent rationale for this study was to examine the determinants of
green purchase intention and the mediating effects of perceived behavioural control
(PBC), environmental consciousness and green trust between the suggested
determinants and green purchase intention using the theory of planned behavior
(TPB). The framework was composed of nine (9) variables. The instrument was
adopted from previous studies and had a total of fifty-four (54) items measured using
the seven-point Likert scale. 754 respondents from three universities were selected
and 502 responded indicating a 67% response rate. The Structural Equation
Modeling (SEM) was used to examine the causal and mediating relationships. The
finding showed that perceived behavioural control and environmental consciousness
had a significant direct influence on green purchase intention. Also, the significant
determinants of environmental consciousness were government regulations and
perceived green knowledge. Green perceived value and green availability
significantly predicted green trust. Significant determinants of PBC were green trust,
green price sensitivity and green perceived value. Mediation results indicated that
PBC mediated between trust and intention while environmental consciousness
mediated between green knowledge, government regulations and intention. The TPB
was found to be a robust underpinning theory in explaining the determinants of green
purchase intention in Nigeria since the model achieved the goodness of fit by
meeting the entire criterion. The implication of this study is that the finding provides
valuable insight for the government to formulate stringent regulations to deal with
environmental issues and strategic planning on how to market green products in
Nigeria by the practitioners.
Keywords: green purchase intention, structural equation modeling, Nigeria, green
products, theory of planned behaviour.
vi
ABSTRAK
“Pembelian hijau” merupakan satu fenomena yang dikenali ramai terutamanya di
negara-negara maju dan beberapa buah negara membangun. Walau bagaimanapun,
amalan ini seolah-olah masih perlahan untuk mengumpul momentum di tempat
seperti Nigeria kerana tahap kesedarannya yang rendah. Rasional yang meyakinkan
bagi menjalankan kajian ini adalah untuk mengkaji penentuan niat pembelian hijau
dan kesan pengantara kawalan tingkah laku anggapan(PBC), kesedaran alam sekitar
dan keyakinan hijau (green trust) di antara penentu-penentu yang dicadangkan dan
niat pembelian hijau dengan menggunakan teori tingkah laku terancang (TPB).
Rangka kerja kajian terdiri daripada sembilan (9) pemboleh ubah. Instrumen diambil
daripada kajian sebelumnya dan mempunyai sebanyak lima puluh empat (54) item
yang diukur menggunakan skala tujuh mata Likert. 754 responden dari tiga buah
universiti telah dipilih dan 502 maklum balas yang diterima menunjukkan kadar
tindak balas sebanyak 67%. Permodelan Persamaan Berstruktur (SEM) telah
digunakan untuk mengkaji penyebab dan pengantara dalam hubungan. Dapatan
kajian menunjukkan bahawa kawalan tanggapan tingkah laku dan kesedaran alam
sekitar mempunyai pengaruh langsung yang signifikan terhadap niat pembelian
hijau. Penentu yang signifikan terhadap kesedaran alam sekitar adalah peraturan-
peraturan kerajaan dan tanggapan pengetahuan hijau. Tanggapan nilai hijau dan
ketersediaan hijau secara signifikan meramalkan keyakinan hijau. Penentu penting
PBC adalah keyakinan hijau, sensitiviti harga hijau dan tanggapan nilai hijau.
Keputusan pengantaraan menunjukkan bahawa PBC menjadi pengantara bagi
keyakinan dan niat manakala kesedaran alam sekitar menjadi pengantara bagi
pengetahuan hijau, peraturan kerajaan dan niat. TPB didapati menjadi teori asas yang
kukuh dalam menerangkan penentuan niat pembelian hijau di Nigeria
memandangkan model tersebut mencapai kebaikan suai dengan memenuhi
keseluruhan kriteria. Implikasi bagi kajian ini adalah dapatan kajian memberikan
pandangan yang berharga bagi kerajaan untuk menggubal peraturan-peraturan yang
ketat bagi menangani isu-isu alam sekitar dan menyediakan pandangan kepada
pengamal untuk membuat perancangan strategik mengenai cara untuk memasarkan
produk-produk hijau di Nigeria.
Kata kunci: niat pembelian hijau, pemodelan persamaan berstruktur, Nigeria,
produk hijau, teori tingkah laku terancang
vii
ACKNOWLEDGMENTS
First and foremost, I wish to express my gratitude to God the Father, God the Son
and God the Holy Spirit who gave me wisdom, health and knowledge to carry out
this research. Praise and Honour be unto Him in Jesus most precious name.
I wish to sincerely express my immense gratitude to my supervisor, Professor (Dr)
Nik Kamariah Nik Mat for her invaluable and untiring supervisory role in the course
of writing this thesis. Your wealth of experience in guiding the writing of this piece
of work brought it to this successful end; words are not enough to express how I
appreciate your support and encouragement. Indeed it has been a blessing working
with you. Thank you.
It is pertinent to appreciate the entire viva and proposal defence committee in the
persons of Prof. (Dr) Mahadzirah Mohamad, Professor Madya (Dr) Norazila Mohd
Noor and Prof. (Dr) Abdul Razak and Dr Ku Awanis Ishak for their immense
insightful contributions to this work.
Also, I am indebted to my husband and children for their understanding, prayers,
patience and perseverance which really gave me the moral support to forge ahead in
the pursuance of this PhD degree.
Furthermore, I also register my thanks to the management of Waziri Umaru Federal
Polytechnic and the Management of TETFUND for their support and sponsorship for
this study.
Lastly, my thanks go to all my friends and those who directly or in any way
contributed to the successful completion of my PhD journey. I pray that God reward
you all.
viii
PUBLICATIONS FROM THIS STUDY
Haruna-Karatu, V. M., & Nik-Mat, N. K. (2015). Predictors of green purchase
intention Nigeria: The mediating role of environmental consciousness.
American Journal of Economics, 5(2), 291-302.
Haruna-Karatu, V. M., & Nik-Mat, N. K. (2015). The determinants of green purchase
intention in Nigeria: Mediating rffect of perceived behavioral control.
International Scholarly and Scientific Research & Innovation
waset.org.17(4), 2114-2123.
Haruna-Karatu, V. M., & Nik-Mat, N. K. (2015). The mediating effects of green trust
and perceived behavioural control on the direct determinants of intention to
purchase green products in Nigeria. Mediterranean Journal of Social
Sciences, 6 (4), 2039-9340.(Scopus)
Haruna-Karatu, V. M., & Nik-Mat, N. K. (2014). A new model of green purchase
intention and its derivatives: Confirmatory factor analysis validation of
constructs Information Management and Business Review, 6(5), 261 268,
Oct 2014 (ISSN) 2220-3796.
Haruna-Karatu, V. M., & Nik-Mat, N. K. (2014). Modeling green purchase
behvaiour in Nigeria: A conceptual proposition management,3(7),480-483
DOI:10.5923/j.mm.20130307.Published online http://journal
.sapub.org/mm Scientific & Academic Publishing.
Haruna-Karatu, V. M., & Nik-Mat, N. K. (2015). Determinants of green purchase
intention: Mediating role of perceived green value. Proceedings of
International Conference on Accounting Studies, (ICAS 2015). August 17th
-
20th
. Johor Bahru.
ix
TABLE OF CONTENTS
Title Page
TITLE PAGE i
CERTIFICATION OF THESIS WORK ii
PERMISSION TO USE iv
ABSTRACT v
ABSTRAK vi
ACKNOWLEDGMENTS vii
TABLE OF CONTENTS ix
LIST OF TABLES xxiii
LIST OF FIGURES xxvi
LIST OF ABBREVIATIONS xxviii
LIST OF APPENDIX xxix
CHAPTER ONE: INTRODUCTION 1
1.0 Preambles 1
1.1 Background of the Study 1
1.2 Problem Statement 4
1.2.1 Low Level of Green Purchase Intention 4
1.2.2 Weak Enforcement of Government Regulation 8
1.2.3 Low level of Environmental Consciousness 10
1.2.4 Lack of Trust on Green Products 12
1.2.5 Limited Studies on the Mediating Effects of Perceived Behavioural
Control, Environmental Consciousness and Green Trust in Green 14
1.3 Research Questions 16
1.5 Research Objectives 17
1.6 Significance of the Research 19
x
1.6.1 Government 20
1.6.3 Academicians 21
1.6.4 Consumers 21
1.6.5 Methodology 22
1.7 Scope of the Study 22
1.8 Chapter outline of the Study 23
1.9 Summary of Chapter 25
CHAPTER TWO: LITERATURE REVIEW 27
2.0 Preambles 27
2.1 Green Purchase Intention (GPI) 27
2.2 Green Product 31
2.3 Green Marketing 34
2.4 Underpinning Theory 37
2.4.2 Constructs of TPB 39
2.4.2.1 Attitude 39
2.4.2.2 Attitudinal Belief 40
2.4.2.3 Subjective Norms 40
2.4.2.4 Normative belief 41
2.4.2.5 Perceived Behavioural Control 41
2.4.2.6 Control belief 43
2.4.3 Theory of Planned Behaviour Applied In Green Purchase Intention
Studies 43
2.4.3.1 Justification for adopting Theory of Planned Behaviour 47
2.5 Simple Green Purchase Intention Models 48
2.6 Complex Green Purchase Intention Models 58
xi
2.6.1 Examples of Complex Models in Green Purchase Intention Studies 60
2.7 Direct Determinants of Green Purchase Intention 69
2.8 Review of Past Studies on Determinants of Green Purchase Intention 76
2.8.1 Perceived Behavioural Control and Green Purchase Intention 77
2.8.2 Environmental Consciousness and Green Purchase Intention 79
2.8.3 Green Trust and Green Purchase Intention 84
2.8.4 Perceived Green Knowledge and Green Purchase Intention 87
2.8.5 Government Regulations and Green Purchase Intention 92
2.8.6 Green Perceived Value and Green Purchase Intention 94
2.8.7 Green Price Sensitivity and Green Purchase Intention 96
2.8.8 Green Availability and Green Purchase Intention 100
2.9 Other Direct Determinants of Green Purchase Intention 102
2.10 Determinants of Perceived Behavioural Control 103
2.10.1 Perceived Green Knowledge and Perceived Behavioural Control 104
2.10.2 Government Regulation and Perceived Behavioural Control 104
2.10.3 Green Trust and Perceived Behavioural Control 105
2.10.4 Green Price Sensitivity and Perceived Behavioural Control 105
2.10.5 Perceived Green Value and Perceived Behavioural Control 106
2.10.6 Green Availability and Perceived Behavioural Control 106
2.11 Determinants of Environmental Consciousness 108
2.11.1 Perceived Green Knowledge and Environmental Consciousness 108
2.11.2 Government Regulations and Environmental Consciousness 108
2.11.3 Green Perceived Value and Environmental Consciousness 109
2.12 Determinants of Green Trust 110
2.12.1 Green Perceived Value and Green Trust 110
xii
2.12.2 Green Price Sensitivity and Green Trust 111
2.12.3 Green Availability and Green Trust 112
2.13 Mediating Variables 113
2.13.1 The Mediating Role of Perceived Behavioural Control, Environmental
Consciousness and Green Trust 116
2.13.1.1 Perceived Behavioural Control as a Mediator 116
2.13.1.2 Environmental Consciousness as a Mediator 118
2.13.1.3 Green Trust as a Mediator 119
2.14 Summary of Chapter 121
CHAPTER THREE: RESEARCH FRAMEWORK AND DEVELOPMENT
OF RESEARCH HYPOTHESES 123
3.0 Preambles 123
3.1 The Research Framework 123
3.2 Research Hypotheses 127
3.2.1 Perceived Behavioural Control and Green Purchase Intention 127
3.2.2 Environmental Consciousness and Green Purchase Intention 128
3.2.3 Green Trust and Green Purchase Intention 128
3.2.4 Perceived Green Knowledge and Green Purchase Intention 129
3.2.5 Government Regulation and Green Purchase Intention 130
3.2.6 Green Perceived Value and Green Purchase Intention 130
3.2.7 Green Price Sensitivity and Green Purchase Intention 131
3.2.8 Green Availability and Green Purchase Intention 132
3.2.9 Perceived Green Knowledge and Perceived behavioural control 133
3.2.10 Government Regulations and Perceived Behavioural Control 134
3.2.11 Government Regulations and Environmental Consciousness 135
xiii
3.2.12 Green Perceived Value and Environmental Consciousness 135
3.2.13 Green Perceived Value and Green Trust 136
3.2.14 Green Price Sensitivity and Green Trust 137
3.2.15 Green Availability and Green Trust 137
3.2.16 Green Trust and Perceived Behavioural Control 138
3.2.17 Green Price Sensitivity and Perceived Behavioural Control 138
3.2.18 Green Perceived Value and Perceived Behvioural Control 139
3.2.19 Green Availability and Perceived Behavioural Control 140
3.2.20 Perceived Green Knowledge and Environmental Consciousness 140
3.2.21 Perceived Behavioural Control mediates between Perceived Green
Knowledge and Green Purchase Intention 141
3.2.22 Perceived Behavioural Control mediates between Government
Regulations and Purchase Intention 142
3.2.23 Perceived Behavioural Control mediates between Green Price
Sensitivity and Green Purchase Intention 142
3.2.24 Perceived Behavioural Control mediates between Green Availability
and Green Purchase Intention 143
3.2.25 Perceived Behavioural Control mediates the relationship between
Green Trust and Green Purchase Intention 144
3.2.26 Environmental Consciousness mediates the relationship between
Government Regulation and Green Purchase Intention 144
3.2.27 Environmental Consciousness mediates the relationship between
Perceived Value and Green Purchase Intention 145
3.2.28 Environmental Consciousness mediates between Perceived Green
Knowledge and Green Purchase Intention 145
xiv
3.2.29 Green Perceived Value mediates Green Trust and Green Purchase
Intention 146
3.2.30 Green Trust mediates between Green Price Sensitivity and Green
Purchase Intention 146
3.2.31 Green Trust mediates between Green Availability and Green Purchase
Intention 147
3.2.32 Green Trust mediates the relationship between Green Price Sensitivity
and Perceived Behavioural Control 148
3.2.33 Green Trust mediates the relationship between Green Availability and
Perceived Behavioural Control 148
3.2.34 Green Trust mediates the relationship between Green Perceived Value
and Perceived Behavioural Control 149
3.4 Operational Definition 149
3.5 Summary of Chapter 151
CHAPTER FOUR: RESEARCH METHODOLOGY 152
4.0 Preamble 152
4.1 Research Design 152
4.2 Sample Design of the Research 154
4.3 Population Frame 154
4.4 Sampling Method 155
4.4.1 Sampling Frame 156
4.4.2 Sample Size Determination 157
4.5 Data Collection Procedure 159
4.5.1 Pilot Data Collection 159
4.5.2 Actual Data Collection Procedure 160
xv
4. 6 Questionnaire Design 161
4.7 Measurement of Constructs 162
4 .7.1 Green Purchase Intention (GPI) 164
4.7.2 Perceived Behavioural Control (PBCL) 165
4.7.3 Environmental Consciousness (ECC) 165
4.7.4 Green Trust (GTST) 166
4.7.5 Perceived Green Knowledge (PGKL) 167
4.7.6 Green Perceived Value (GPV) 167
4.7.7 Green Price Sensitivity (GPST) 168
4.7.8 Government Regulations (GRN) 168
4.7.9 Green Availability (GAV) 169
4.8 Pre-Test of Questionnaires 170
4.9 Exploratory Factor Analysis 171
4.9.1 Factor Analysis for Independent Variable of Pilot Study 172
4.9.2 Factor Analysis for Dependent Variable 172
4.9.3 Bartlett’s Test and Kaiser-Meyer-Olkin (KMO) 173
4.10 Response Bias 173
4.11 Demographic Profile 174
4.12 Data Screening 174
4.12.1 Missing Data 175
4.12.2 Detecting Outliers 176
4.12.3 Normality Test 177
4.12.4 Descriptive Statistics of Data 178
4.12.5 Test of Linearity 179
4.12.6 Homoscedasticity 180
xvi
4.12.7 Multicollinearity 180
4.13 Test of Reliability 181
4.13.1 Reliability (Cronbach Alpha) 181
4.13.2 Composite Reliability 183
4.14 Test of Validity 183
4.14.1 Content (face) Validity 184
4.14.2 Construct Validity 185
4.14.3 Convergent validity 185
4.15 Discriminant Validity 186
4.16 Method of Data Analysis 187
4.16.1 Structural Equation Modeling (SEM) 187
4.16.2 The Rationale for using Structural Equation Modeling 188
4.16.3 Types of Error In Structural Equation Modeling 192
4.16.4 Types of Variables used in Structural Equation Modeling 193
4.16.5 Steps in Structural Equation Modeling Analysis 194
4.16.5.1 Model Conceptualizing 194
4.16.5.2 Identification of Parameters 195
4.16.5.3 Model Specification 196
4.16.5.4 Estimation of Model 198
4.16.5.5 Model modification 199
4.16.5.6 Evaluation of Parameters 200
4.17 Estimation of Model Fit 202
4.17. 1 Absolute Fit Indices 203
4.17.2 Incremental Fit Index 203
4.17.3 Parsimony Fit Indices 203
xvii
4.18 Benchmark for Goodness of Fit Indices 204
4.19 Testing of Hypotheses 205
4.19.1 Direct Relationship (Effects) 205
4.19.2 Indirect Relationships (Effects) 206
4.19.2.1 Bootstrapping 206
4.20 Summary of Chapter 207
CHAPTER FIVE: FINDINGS 208
5.0 Preambles 208
5.1 Response Rate 209
5. 2 Screening Question 210
5.2.1 Discussion on the Screening Question 210
5.3 Demographic Profile of Respondents 210
5.4 Descriptive Statistics Indicators 212
5.5 Screening of Data 212
5.5.1 Missing Data Detection 213
5.5.2 Response Bias 213
5.5.3 Outliers 214
5.5.4 Normality 215
5.4.5 Histogram 216
5.4.6 Linearity 217
5.4.7 Homoscedacity 218
5.4.8 Multicollinearity 219
5.5 Test for Validity of Constructs 220
5.5.1 Construct Validity 220
5.5.1.1 Cronbach Alpha 220
xviii
5.5.1.2 Composite Reliability 221
5.5.2 Convergent Validity 222
5.5.2.1 Exploratory Factor Analysis 222
5.5.2.2 Confirmatory Factor Analysis (CFA) 223
5.5.3 Discriminant Validity 230
5.5.3.1 Correlation 230
5.5.3.2 Average Variance Extracted 232
5.6 Hypothesized Structural Model 234
5.7 Generated Model 235
5.7.1 Goodness of Fit Indices 236
5.8 Results of Direct Relationship 237
5.8.1 Summary of findings on Direct Relationship from Generated Model 244
5.9 Mediating Effects of Perceived Behavioural Control, Environmental
Consciousness and Green Trust 245
5.9.2 The mediating Effect of Environmental Consciousness 247
5.10 Squared Multiple Correlations (SMC) 249
5.11 Summary of Chapter 252
CHAPTER SIX: DISCUSSION AND CONCLUSION 254
6.0 Preambles 254
6.1 Recapitulation of the Research Objectives 254
6.2 Objective One: Discusses the Direct Determinants of Green Purchase
Intention in Nigeria 256
6.2.1 Significant Determinants of Green Purchase Intention in Nigeria 256
6.2.1.1 Perceived behavioural Control and Green Purchase Intention 256
6.2.1.2 Environmental consciousness and Green Purchase Intention 257
xix
6.2.2. Insignificant Determinants of Green Purchase Intention in Nigeria 258
6.2.2.1 Green Trust and Green Purchase Intention 258
6.2.2.2 Perceived Green Knowledge and Green Purchase Intention 259
6.2.2.3 Government Regulation and Green Purchase Intention 259
6.2.2.4 Green Perceived Value and Green Purchase Intention 260
6.2.2.5 Green Price Sensitivity and Green Purchase Intention 261
6.2.2.6 Green Availability and Green Purchase Intention 261
6.3 Objective Two: Discussion on the Determinants of Perceived 262
Behavioural Control 262
6.3.1 Significant Determinants of Perceived Behavioural Control among 262
Nigerian Consumers 262
6.3.1.1 Green Trust and Perceived Behavioural Control 262
6.3.1.2 Green Price Sensitivity and Perceived Behavioural Control 263
6.3.1.3 Green Perceived Value and Perceived Behavioural Control 263
6.3.2.1 Perceived Green Knowledge and Perceived Behavioural Control
264
6.3.1.2 Government Regulations and Perceived Behavioural Control 265
6.4 Objective Three: Discussion on Determinants of Environmental 266
Consciousness in Nigeria 266
6.4.1 Significant Determinant of Environmental Consciousness 266
6.4.1.1 Perceived Green Knowledge and Environmental consciousness 266
6.4.1.2 Government Regulations and Environmental Consciousness 267
6.4.1.3 Green Perceived Value and Environmental Consciousness 268
6.5 Objective Four: Discussion on the Determinants of Green Trust among
Nigerian Consumers 269
xx
6.5.1 Significant Determinants of Green Trust among Nigerian Consumers269
6.5.1.1 Green Perceived Value and Green Trust 269
6.5.1.2 Green Availability and Green Trust 270
6.5.2 Insignificant Determinants of Green Trust 270
6.5.2.1 Green Price Sensitivity and Green Trust 270
6.6 Objective Five: Discussion on the Mediating Effects of Perceived
Behavioural Control, Environmental Consciousness and Green Trust 271
6.6.1 Significant Mediating Effects 271
6.6.1.1 Perceived Behavioural Control Mediates between Green Trust and
Green Purchase Intention 271
6.6.1.2 Environmental Consciousness mediates between Perceived Green
Knowledge and Green Purchase Intention 272
6.6.2.3 Environmental Consciousness mediates between Government 273
Regulations and Green Purchase Intention 273
6.6.2 Insignificant Mediating Effects of Perceived Behavioural Control,
Environmental Consciousness and Green Trust. 274
6.6.2.1 Perceived Behavioural Control Mediates between Green Price
Sensitivity and Green Purchase Intention 274
6.6.2.2 Perceived Behavioural Control as Mediator between Green
Availability and Green Purchase Intention 274
6.6.2.3 Perceived Behavioural Control mediates between Perceived Green
Knowledge and Green Purchase Intention 275
6.6.2.4 Perceived Behavioural Control mediates between Government
Regulations and Green Purchase Intention 275
6.6.2.5 Environmental Consciousness mediates between Green Perceived
xxi
Value and Green Purchase Intention 276
6.6.2.6 Green Trust mediates between Green Perceived Value and Green
Purchase Intention 277
6.6.2.7 Green Trust mediates between Green Availability and Green
Purchase Intention 277
6.6.2.8 Green Trust mediates between Green Price Sensitivity and Green
Purchase Intention 278
6.6.2.9 Green Trust Mediates between Green Price Sensitivity and
Perceived Behavioural Control 279
6.6.2.10 Green Trust Mediates between Green Availability and Perceived
Behavioural Control 279
6.6.2.11 Green Trust Mediates between Green Perceived Value and
Perceived Behavioural Control 280
6.7 Implication of the Study 280
6.8.1 New Contribution 281
6.8.2 Methodological Contribution 282
6.8.3 Contribution to Nigerian Government 283
6.8.3.1 Up Grading Resources 283
6.8.3.2 Create Awareness 284
6.8.3.3 Introduce Stringent Government Regulation 285
6.8.3.4 Encourage Proper Waste Management and Recycling 286
6.8.3.5 Encourage Individual Participation 286
6.8.3.6 Incentives 287
6.8.4 Contribution to Practitioners 288
6.8.4.1 Communicate Environmental Benefits 289
xxii
6.8.4.2 Winning the Consumer’s Heart 290
6.8.4.3 Promotion Strategy 291
6.8.4.4 Variety of Green Products 292
6.9 Limitation of the Study 294
6.11 Suggestions for Future Research 297
6.12 Conclusion of the Study 299
REFERENCES 301
xxiii
List of Tables
Table Page
Table 1.1 Green Purchase Behaviour by Region 7
Table 1.2 Summary of Research Problems, Research Questions and Research
Objectives 19
Table 2.1 Theory of Planned Behaviour Applied in Green Purchase Intention
Studies 46
Table 2.2 Summary of Relationship on the Direct Determinants of Green Purchase
Intention with Findings 71
Table 2.3 Summary of Studies on Perceived Behavioural Control and Green
Intention 79
Table 2.4 Summary of Studies on Environmental Consciousness and Green
Purchase Intention 84
Table 2.5 Summary of Studies Showing Relationship between Green Trust and
Green Purchase Intention 87
Table 2.6 Summary of studies showing Relationship between Green Knowledge
and Green Purchase Intention 91
Table 2.7 Summary of studies on the relationship between Government Regulations
and Green Purchase Intention 94
Table 2.8 Summary of studies showing the Relationship between Perceived Value
and Green Purchase Intention 96
Table 2.9 Summary of Studies showing Relationship between Green Price
Sensitivity and Green Purchase Intention 99
Table 2.10 Summary of studies showing Relationship between Availability and
Green Purchase Intention 101
xxiv
Table 2.11 Summary of Determinants of Perceived Behavioural Control 107
Table 2.12 Summary of Determinants of Green Trust 112
Table 2.13 Mediating Variables 114
Table 2.14 Mediating Effect of Perceived Behavioural Control 117
Table 2.15 Mediating Effect of Environmental Consciousness 119
Table 2.16 Mediating Effect of Green Trust 120
Table: 3.1 Operational Definitions 149
Table 4.1 Rule of Thumb for Sample Size 157
Table 4.2 Sample Size Distribution of Questionnaire 158
Table 4.3 Summary of Construct, Items and Reliability Values of Pilot study and
Past studies 160
Table 4.4 Green Purchase Intention Construct (GPI) 165
Table 4.5 Perceived Behavioural Control Construct (PBCL) 165
Table 4 .6 Environmental Consciousness Construct (ECC) 166
Table 4.7 Green Trust Construct (GTST) 166
Table 4.8 Perceived Green Knowledge (PGKL) 167
Table 4.9 Green Perceived Value Construct (GPV) 167
Table 4.10 Green Price Sensitivity Construct (GPST) 168
Table 4.11 Government Regulations Construct (GRN) 169
Table 4.12 Green Availability Construct (GAV) 169
Table 4.13 Summary of Measurement Items 170
Table 4.14 Summary of Goodness of Fit Indices and Criterion 205
Table 5.1 Summary of Response Rate 209
Table 5. 2 T- Test to Compare between Knowledgeable and Non-knowledgeable
Respondents 210
xxv
Table 5.3 Summary of Descriptive Statistics Indicators of Variables 212
Table 5.4 Response Bias Test 214
Table 5.5 Residuals Statistics on Mahalanobis Distance 215
Table 5.6 Multicollinearity Test Based on Variance Inflated Factor (VIF) 220
Table 5.7 Reliability of Variables (N=440) 221
Table 5.8 Goodness of Fit Summary of CFA of Individual, Exogenous,
Endogenous and Combined Measurement Model (N=440) 225
Table 5.9 Summary of Factor Loading for EFA and CFA 226
Table 5.10 Correlations among Constructs 229
Table 5.11 Correlation and Correlation Squared Matrix among Constructs 231
Table 5.12 Variance Extracted for Latent Variables 232
Table 5.13 Average Variance Extracted (AVE) Matrix of Constructs 233
Table 5.14 Goodness of Fit of Hypothesized Structural and Generated Model
N=440) 237
Table 5.15 Direct Effects of Generated Model 238
Table 5.16 Mediating Effect of Perceived Behvaioural Control 247
Table 5.17 Mediating Effect of Environmental Consciousness 248
Table 5.18 Mediating Effects of Green Trust 249
Table 5.19 Squared Multiple Correlations for Endogenous Variables 250
Table 5.20 Summary of Hypotheses Results 251
xxvi
List of Figures
Figure Page
Figure 1.1 Chapter Plan of the Study 25
Figure 2.1 Green Products Types 32
Figure 2.2 Stages in Green Marketing History 35
Figure 2.3 Theory of Planned Behaviour 38
Figure 2.4 Purchase Intention (Green): Model 1 50
Figure 2.5 Green Purchase Intention: Model 2 51
Figure 2.6 Purchase Intention (Green): Model 3 51
Figure 2.7 Intention to Buy Organic Food: Model 4 52
Figure 2.8 Green Purchase Intention: Model 5 52
Figure 2.9 Purchase Intention (Green): Model 6 53
Figure 2.10 Green Purchase Intention: Model 7 53
Figure 2.11 Green Purchase Intention: Model 8 54
Figure 2.12 Green Purchase Intention: Model 9 54
Figure 2.13 Purchase Intention: Model 10 55
Figure 2.14 Green Purchase Intention: Model 11 55
Figure 2.15 Consumers’ Purchase Intention (Green): Model 12 56
Figure 2.16 Purchase Intention (Green): Model 13 56
Figure 2.17 Intention to Purchase Green: Model 14 57
Figure 2.18 Intention Buy Organic Product: Model 15 57
Figure 2.19 Green Purchase Intention: Model 16 60
Figure 2.20 Green Consumption Behavioural Intention: Model 17 61
Figure 2.21 Purchase Intention (Green): Model 18 61
xxvii
Figure 2.22 Purchase Intention (Green): Model 19 62
Figure 2.23 Intention to Purchase (Green): Model 20 62
Figure 2.24 Green Purchase Intention (Green): Model 21 63
Figure 2.25 Purchase Intention (Green): Model 22 63
Figure 2.26 Behavioural Intention (Green): Model 23 64
Figure 2.27 Behavioural Intention (Green): Model 24 64
Figure 2.28 Behavioural Intention (Green): Model 25 65
Figure 2.29 Green Purchase Intention: Model 26 65
Figure 2.30 Green Purchase Intention: Model 27 66
Figure 2.31 Environmentally Savvy Products (Green): Model 28 66
Figure 2.32 Intention to Buy Green: Model 29 67
Figure 2.33 Purchase Intention (Green): Model 30 67
Figure 2.34 Intentions to Buy Green Mobiles: Model 31 68
Figure2.35 Determinants of Green Trust in previous studies 113
Figure 3.1 Research Framework 126
Figure 5.1 Normality Assumption 217
Figure 5.2 Linearity Assumption 218
Figure 5.3 Homoscedasticity Assumption 219
Figure 5.4 Hypothesized Model 235
Figure 5.5 Generated Model 236
Figure 5. 6 Summary of Findings from Generated Model 245
xxviii
LIST OF ABBREVIATIONS
AMOS Analysis of Moment Structure
AVE Average Variance Extracted
CFA Confirmatory Factor Analysis
CFI Comparative Fit Index
CR= T Critical Ratio (AMOS) T- Value (SPSS)
CR Composite Reliability
CMIN/DF Chi-Square Per Degree of Freedom
VE Variance Extracted
DF Degree of Freedom
EC Environmental Consciousness
EFA Exploratory Factor Analysis
GFI Goodness of Fit Index
GOF Goodness of Fit
GRN Government Regulations
GPV Green Perceived Value
GAV Green Availability
GTS Green Trust
GPST Green Price Sensitivity
GPI Green Purchase Intention
GM Generated Model
MI Modification Indices
P P-value
Β Beta
PBC Perceived Behavioural Control
R2
R Square (SPSS)
RMSEA Root Mean Square Error of Approximation
SIG Significant
SEM Structural Equation Modeling
SMC Squared Multiple Correlation=R2
SPSS Statistical Package for Social Science
TLI Tucker-Lewis Index
TPB Theory of Planned Behaviour
TRA Theory of Reasoned Action
χ2 Chi-Square
PNFI Parsimonious Normed Fit Index
xxix
LIST OF APPENDIX
Appendix A Summary of Direct Determinants of Green Purchase Intention
Appendix B Summary of Direct Determinants of Purchase Intention in Non-
Green
Appendix C Questionnaires Used for Actual Data Collection
Appendix D Exploratory Factor Analysis Result Actual Data
Appendix E Demographic Profile of Respondents
Appendix F Test for Normality of Actual Data
Appendix G Missing Data Output
Appendix H Reliability of Construct for Actual Data
Appendix I Confirmatory Factor Analysis Results for Actual Data
Appendix J Generated Model Output
Appendix K Bootstrapping Out
1
CHAPTER ONE
INTRODUCTION
1.0 Preambles
This chapter introduces the background and the main issues of this study. The issues
are centred on low level of green purchase intention, environmental problems such as
oil spillage, flood, waste pollution, desertification and deforestation which connote
the lack of environmental consciousness and weak government regulation, lack of
trust on green products, low knowledge and awareness towards green products.
Furthermore, it covers the statement of the problems which are the bedrock of this
study; research questions, objectives, significance of the research, justifications,
scope, contributions and the chapter plan.
1.1 Background of the Study
In recent times, concern for the environment has increased steadily across the globe
and has translated into consumers’ awareness which is portrayed in their nutrition,
health and quality of food in terms of purchase and consumption as most of them are
now connecting the dots to their main lifestyle. The demands for green product
became inevitable (Ali & Ahmad, 2012; Chen, 2010; Kalafatis, Polland, East &
Tsogas, 1999; Paco & Raposo, 2009; Rashid, 2009), thus, the birth of green
consumers.
Taking a look at what happens globally, there has been incessant increase in
consumers who are environmentally concerned and this in turn has led to a drastic
growth of green products market (Hunt & Dorfman, 2009). Gupta and Ogden (2009)
301
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